Air-compressor.



a. T. KENNEDY. MR COMPRESSOR APPLICATIQN FILED 58.], 1916 2 SHEETS-SHEET1'.

g a. 1". Kennedy Patentedlug. 28,1917.

G. T.KENNEDY. MR COMPRESSOR.

APPLICATION FILED FEB. I, 1916.

Patented Aug. 28, 1917.

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GEORGE T. KENNEDY, OF CALGARY, ALBERTA, CANADA.

AIR-COMPRESSOR.

Specification of Letters Patent.

Application filed February 7, 1916. Serial No. 76,736 i 1 To all whom itmay concern:

,Be it known that I, Gnonen T. KENNEDY, a subject of the King of GreatBritain, residing at Calgary, in the Province of Alberta and Dominion ofCanada, have -in-- vented new and useful Improvements inAir-Compressors, of which the following is a specification.

This invention relates to improvements in air compressors and hasparticular application to a centrifugal compressor.

In carrying out the present invention, it is my purpose to provide acentrifugal air' compressor which will embody in its construction aninner stationary cylinder formed with valve controlled ports and anouter revolving cylinder surrounding the stationary cylinder and havingslots formed therein and equipped with outwardly projectingtangentiallycurved blades adapted to draw the air through the slots andforce the same through the valved ports of the stationary cylinder intothe latter so that the compressed air may be taken from the innercylinder. 1 v I It is also my purpose to provideacentrifugal aircompressor which will embody comparatively few parts and these soarranged and correlated as to reduce the pos "sibility of derangement toa minimum and wherein the parts of the compressor may be lubricated andcooled.

With the above and other objects in view, the invention consists in theconstruction, combination and arrangement of parts hereinafter set forthin and falling within the scope of the claims' In the accompanyingdrawings;

Figure 1 is a view inelevation of an air designates a stationarycylinder formed with longitudinally extending passages 2 spaced apartaround the cylinder and adapted to receive a cooling liquid. Formed inthe outer surface of the cylinder 1 adjacent to the respective endsthereof are annular grooves or raceways 3. While formed in the' cylinderbetween the grooves 3 are a plurality of ports 4 and arranged in eachport 4 is an inwardly opening check valve fi which permits air or otherfluid to flow through the ports and into the cylinder, but prevents Ythe return of such fluid through'the ports. Surrounding thelcylinder 1and adapted to rotate thereabout is a. cylinder 6 of less length thanthe cylinder 1 and formed in the inner wall of the cylinder 6 adjacentto the respective ends thereof and coinciding with the grooves orraceways 3 are grooves or raceways 7 and disposed within these aliningraceways are ball bearings acting toreduee the friction between therevolving H cylinder and the stationary cylinder in the rotation ofthecylinder 6. Formed in the Patented Aug". 28, 1917.

cylinder 6 between 'the ends thereof are longitudinal s1ots 8 spacedapart around the cylinder-and communicating with the ports 4. The undersurface of the cylinder. dcontiguous to corresponding side edge walls ofthe slots 8 is undercut as at 9. Secured 'to said side edge walls of thecylinder 6 and projecting outwardly therefrom are blades 10 and eachblade 10 is curved incross section and disposed substantially at atangent to the cylinder. Surrounding the outer revolving cylinder 6adjacent to the respective ends thereof and fixed thereto are end plates11 closing the ends ot the spaces between the blades 10 and carried bythe end plates 11, while surrounding he blades 10 and the revolvingcylinder' isl a casing 12 composed of suitable aterial formed in suchmanner that air iidayfie drawn through such casing. The projecting endsof the inner stationary cylinder 1 are act to'support the compressorasshown in Figs. 1 and '3, while fixed to one end of the mounted insuitable alining bearings which cylinder (3 is a pulley H whereby therevolving cylinder and theblades carricdthcreby may be rotated. One endof the inner cylin der is open so that the compressor may be connectedwith a suitable storage tank. Any suitable means may be employed forlubrieating the compressor.

In practice, the cylinder 5 is rotated about the stationary cylinder andin the rotation of the cylinder 6 the blades 10 act to draw air towardthe slots'8 and'compress such air to force the same through the valvedports 4 and into the stationary cylinder whence such air may be conveyedto a suitable receiver.

/Vhile l have herein shown and described the preferred form of myinvention by way of illustration, 1 Wish it to be understood that I donot limit or confine myself to the precise details of constructionherein de scribed and delineated, as modification and variation may bemade within the scope of the claims and without departing from thespirit of the invention.

I claim:

I. In a centrijin 'al air compressor, a stationary cylinder; formed withvalved ports, a revolving cylinder surrounding said stationarycylinderand formed with longitudinal slots spaced apart about saidrevolving cylinder, and blades secured to corresponding edge walls ofsaid slots respectively and projecting outwardly from such revolvingcylinder substantially at a tan gent thereto and curved in cross sectionwhereby air may be drawn into said slots and compressed through saidports into said stationarv cylinder in the movement of the revolvingcylinder.

2. In a centrifugal air compressor, a stationary. cylinder formed withvalved ports, a revolving cylinder surrounding said stationary cylinderand formed with longitudinal slots spaced apart about said revolvingcylinder, blades secured to corresponding edge Walls of said slotsrespectively and projecting ouhvardly from such revolving cylindersubstantially at a tangent thereto and curved in cross section wherebyair may be drawn into said slots and compressed through said ports intosaid stationary cylinder in the movement of the revolving cylinder,plates closing the ends of said revolving cylinder. and a casinginclosing said cylinder and secured to said end plates and formed insuch manner that air may be drawn therelhrougl'i.

In a. centrifugal air compressor, a stationary cylinder formed withvalved ports, a revolving cylinder surrounding said stationary cylinderand formed with longitudinal slots spaced apart about said revolvingcylinder, and blades secured to corresponding edge walls of said slotsrespectively and projecting outwardly from such revolving cylindersubstantially at a tangent thereto and curved in cross section wherebyair maybe drawn into said slots and co1npressed through said ports intosaid stationary cylinder in the movement of the revol ring cylinder,said stationary cylinder being formed with longitudinally extendingpassages through which a cooling fluid may be passed.

In testimony whereof I aliix my signature in presence of two Witnesses.

GEORGE T. KENNEDY.

Witnesses:

Annxnzvnm Hniuuo'r. SAMUEL H. ADAMS.

